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1
المساهمون: Sharp, Leslie Theodore, 1888-
الإتاحة: http://data.europeana.eu/aggregation/europeana/08711/https___www_biodiversitylibrary_org_item_94184
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2
المساهمون: Burgess, Paul Steere, 1885-1968
الإتاحة: http://data.europeana.eu/aggregation/europeana/08711/https___www_biodiversitylibrary_org_item_90640
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8
المساهمون: Burgess, Paul Steere, 1885-1968
الإتاحة: http://data.europeana.eu/aggregation/europeana/08711/https___www_biodiversitylibrary_org_item_124713
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9
المساهمون: Gericke, W. F. (William Frederick), 1882-
الإتاحة: http://data.europeana.eu/aggregation/europeana/08711/https___www_biodiversitylibrary_org_item_124711
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10دورية أكاديمية
المؤلفون: Lipman, C. B., Sharp, L. T.
المصدر: Botanical Gazette, 1915 May 01. 59(5), 402-406.
URL الوصول: https://www.jstor.org/stable/2468437